medium Set 86 Form Exercise

Number Chain: 7 → -5 → x4 → -6 → -1 → ?

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Answer: 1

SubType
number-chain
Start
7
Steps
  • {"op":"-","operand":5}
  • {"op":"x","operand":4}
  • {"op":"-","operand":6}
  • {"op":"-","operand":1}
Difficulty
medium

Number Chain: 9 → -1 → +7 → -7 → x5 → ?

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Answer: 40

SubType
number-chain
Start
9
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":7}
  • {"op":"-","operand":7}
  • {"op":"x","operand":5}
Difficulty
medium

Number Chain: 7 → -5 → -1 → -1 → +3 → ?

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Answer: 3

SubType
number-chain
Start
7
Steps
  • {"op":"-","operand":5}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"+","operand":3}
Difficulty
medium

Number Chain: 2 → x4 → -2 → x4 → x2 → ?

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Answer: 48

SubType
number-chain
Start
2
Steps
  • {"op":"x","operand":4}
  • {"op":"-","operand":2}
  • {"op":"x","operand":4}
  • {"op":"x","operand":2}
Difficulty
medium

Number Chain: 2 → -1 → x4 → -2 → -1 → ?

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Answer: 1

SubType
number-chain
Start
2
Steps
  • {"op":"-","operand":1}
  • {"op":"x","operand":4}
  • {"op":"-","operand":2}
  • {"op":"-","operand":1}
Difficulty
medium

Number Chain: 3 → -2 → -1 → +6 → +8 → ?

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Answer: 14

SubType
number-chain
Start
3
Steps
  • {"op":"-","operand":2}
  • {"op":"-","operand":1}
  • {"op":"+","operand":6}
  • {"op":"+","operand":8}
Difficulty
medium

Number Chain: 9 → +2 → x3 → +3 → x2 → ?

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Answer: 72

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":2}
  • {"op":"x","operand":3}
  • {"op":"+","operand":3}
  • {"op":"x","operand":2}
Difficulty
medium

Number Chain: 5 → +1 → -4 → -1 → x4 → ?

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Answer: 4

SubType
number-chain
Start
5
Steps
  • {"op":"+","operand":1}
  • {"op":"-","operand":4}
  • {"op":"-","operand":1}
  • {"op":"x","operand":4}
Difficulty
medium